Strömgren, Bengt, Address in Commemoration of the Fourth Centenary of the Birth of Tycho Brahe 14th of December, 1946 (1946).

Strömgren, Bengt, “The Development of Astrophysics as a Research Field in the 20th Century: Paper Presented at the American Association for the Advancement of Science’s George Ellery Hale Centennial Symposium, Dallas, 1968” available at AIP Niels Bohr Library.